Vitreous film and heat-mode optical recording medium using same

Details Vitreous film and heat-mode optical recording medium using same Vitreous film and heat-mode optical recording medium using same

1988-12-27

1990-08-07

Ryan, Patrick

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428209, 428433, 428457, 428913, 369284, 369288, 346 76L, 3461351, 430945, B32B 302

Patent

active

049467247

ABSTRACT:
A vitreous film containing, e.g., 30-90 wt. % of Sn, 1-20 wt. % of P, 0.1-20 wt. % of Pb, 2-30 wt. % of 0 and 5-35 wt. % of F is formed by vapor deposition on a substrate such as glass, metal, plastic or ceramic. A light-absorbing substance can be incorporated in the vitreous film to provide a recording layer for a heat-mode optical recording medium capable of causing decoloration or formation of pits on irradiation with a laser beam.

REFERENCES:
patent: 4388400 (1983-06-01), Tabei et al.
patent: 4414273 (1983-11-01), Wada et al.
patent: 4529991 (1985-07-01), Wada et al.
patent: 4580146 (1986-04-01), Nakao et al.

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